若丹明B荧光增强二硫化碳高阶受激喇曼散射

ENHANCEMENT OF HIGH-ORDER STIMULATED RAMAN SCATTERING OF CARBONDISULFIDE BY USING FLUORESCENCE OF DYE RHODAMINE B

利用若丹明 B乙醇溶液的荧光改变了二硫化碳的一至三阶 Stokes喇曼谱线的强度分布 ,选择性地增强了三阶 Stokes喇曼谱线。在泵浦功率密度为～ 560 MW· cm-2 时 ,对染料摩尔浓度分别为～ 1 0 -5、5cm散射池和～ 1 0 -4 、1 cm散射池进行实验 ,观察到二硫化碳的三阶 Stokes喇曼谱线与染料激光形成的共振增强现象及一、二阶 Stokes喇曼谱线的部分或完全耗尽。

WT5”BZ]The light intensity distribution of the first to third order Stokes Raman spectra lines of Carbon disulfide is altered by using fluorescence of dye Rhodamine B in ethanol solution. The third order Stokes Raman spectrum line is selectively enhanced. When the pumping power density is ~560MW·cm -2 , phenomena of resonance between the third order Stokes Raman spectrum line and the dye laser, and of the part or complete depletion of the first and the second order Stokes Raman spectra line are observed. The concentration of dye Rhodamine B is～10 -5 M and ～10 -4 M, and the cell length is 5cm or 1cm. The physical mechanism of the phenomena is discussed.